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2. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   Annual greenhouse gas (GHG) savings from using a ground source heat pump instead of a high-efficiency furnace in a detached residence (assuming no specific supply of renewable energy) Country Electricity CO 2 Emissions Intensity GHG savings relative to natural gas heating oil electric heating; Canada: 223 ton/GWh [36] [37] [38] 2.7 ton/yr: 5.3 ...

3. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   For example, consider a 5000 BTU/h (1465-watt cooling capacity) air-conditioning unit, with a SEER of 10 BTU/(W·h), operating for a total of 1000 hours during an annual cooling season (e.g., 8 hours per day for 125 days). The annual total cooling output would be: 5000 BTU/h × 8 h/day × 125 days/year = 5,000,000 BTU/year

4. British thermal unit - Wikipedia

   en.wikipedia.org/wiki/British_thermal_unit

   The thermochemical calorie is exactly 4.184 J by definition of the International Organization for Standardization (ISO). [4] The thermochemical Btu is calculated by converting from grams to pounds and from Celsius to Fahrenheit. [5] 59 °F (15.0 °C) ≈1,054.80 [6] Used for American natural gas pricing. [3] 60 °F (15.6 °C) ≈1,054.68 [7]

5. All You Need to Know About Peabody Energy (BTU) Rating ... - AOL

   www.aol.com/news/know-peabody-energy-btu-rating...

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6. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   The fourth category of furnace is the high-efficiency condensing gas furnace. High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as ...

7. Power plant efficiency - Wikipedia

   en.wikipedia.org/wiki/Power_plant_efficiency

   For other units, make sure to use a corresponding conversion factor for the units. For example, if using Btu/kWh, use a conversion factor of 3,412 Btu per kWh to calculate the efficiency factor. For example, if the heat rate is 10,500 Btu/kWh, the efficiency is 32.5% (since 3,412 Btu / 10,500 Btu = 32.5%).